rt-thread-official/bsp/stm32f429-apollo/drivers/drv_pcf8574.h

26 lines
707 B
C

#ifndef __DRV_PCF8574_H
#define __DRV_PCF8574_H
#include <board.h>
#include <finsh.h>
#include <rtdevice.h>
#include <rthw.h>
//PCF8574各个IO的功能
#define BEEP_IO 0 //蜂鸣器控制引脚 P0
#define AP_INT_IO 1 //AP3216C中断引脚 P1
#define DCMI_PWDN_IO 2 //DCMI的电源控制引脚 P2
#define USB_PWR_IO 3 //USB电源控制引脚 P3
#define EX_IO 4 //扩展IO,自定义使用 P4
#define MPU_INT_IO 5 //MPU9250中断引脚 P5
#define RS485_RE_IO 6 //RS485_RE引脚 P6
#define ETH_RESET_IO 7 //以太网复位引脚 P7
rt_err_t rt_pcf8574_init(void);
void rt_pcf8574_write_bit(rt_uint8_t bit, rt_uint8_t state);
rt_uint8_t rt_pcf8574_read_bit(rt_uint8_t bit);
#endif